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Liam Quin wrote:
> On Fri, Jan 30, 2004 at 12:02:46AM +0400, David Tolpin wrote:
>>Some schema languages use string regular expressions [...]
>>
>>Providing a structured syntax, similar to that for XML, would help
>>reading and debugging them, for example,
>> local-part = "(" atoms "|" person ")"
>> domain = "(" atoms "|" location ")"
>> start = "(" comment " )?" local-part "@" domain "( " comment ")?"
>
>
> If Perl 6 ends up getting traction I think we'll see a stronger
> move for this, because Perl 6 regular expressions support an
> EBNF-style syntax and context-free (or context-sensitive) grammars
> are integrated into regular expressions.
Just getting the /x flag from Perl 5 would help a lot :) As for the Perl
6 regexen, they are fleshed out quite completely:
http://dev.perl.org/perl6/apocalypse/A05.html
http://dev.perl.org/perl6/exegesis/E05.html
and I believe there are implementations floating around, and the rumour
is strong that the nex regexen will come to Perl 5 this year.
On a related note, something that would be dearly useful in the same
context is Regular Fragmentations:
http://www.simonstl.com/projects/fragment/
--
Robin Berjon
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